National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Pittsburgh - Allegheny County Airport (KAGC)

Lat: 40.36°NLon: 79.92°WElev: 1237ft.

Overcast

46°F

8°C

Humidity 66%
Wind Speed W 14 G 23 mph
Barometer 30.01 in (1017.3 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 7 Nov 2:53 pm EST
Extended Forecast for

Upper St. Clair PA

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 48. West wind around 15 mph.

    High: 48 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 35. West wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 35 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 58. Southwest wind 8 to 17 mph, with gusts as high as 28 mph.

    High: 58 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 40. West wind 11 to 15 mph, with gusts as high as 25 mph.

    Low: 40 °F

    Increasing
    Clouds

  • Monday

    Monday: Mostly sunny, with a high near 57. West wind 11 to 16 mph.

    High: 57 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

  • Veterans Day

    Veterans Day: Partly sunny, with a high near 61.

    High: 61 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 48. West wind around 15 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 35. West wind 6 to 10 mph, with gusts as high as 20 mph.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 58. Southwest wind 8 to 17 mph, with gusts as high as 28 mph.
Sunday Night
Increasing clouds, with a low around 40. West wind 11 to 15 mph, with gusts as high as 25 mph.
Monday
Mostly sunny, with a high near 57. West wind 11 to 16 mph.
Monday Night
Partly cloudy, with a low around 35.
Tuesday
Sunny, with a high near 64.
Tuesday Night
Partly cloudy, with a low around 39.
Veterans Day
Partly sunny, with a high near 61.
Wednesday Night
A chance of rain after 1am. Mostly cloudy, with a low around 39. Chance of precipitation is 30%.
Thursday
A chance of rain. Mostly cloudy, with a high near 55. Chance of precipitation is 50%.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 33. Chance of precipitation is 50%.
Friday
A chance of rain. Mostly cloudy, with a high near 47. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Upper St. Clair PA
 40.33°N 80.11°W (Elev. 899 ft)
Last Update:
2:21 pm EST Nov 7, 2026
Forecast Valid:
3pm EST Nov 7, 2026-6pm EST Nov 13, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation